"The socket 775 Evercool PT02-9232CP heatsink is one of many bifurcated fin heatsink's based almost entirely on the reference RCBFH-3 Intel heatsink design. The Evercool PT02-9232CP heatsink is composed of two
sections - the first is the outer extruded aluminum donut of 25mm long aluminum
radially curved bifurcated cooling fins, the second is an internal 33mm diameter
cylindrical copper slug.
The copper slug makes direct contact with the surface of the LGA775 processor. The Intel 'Prescott FMB2' compliant Evercool PT02-9232CP heatsink is equipped with a
32x92x92mm 4-pin PWM fan that rotates at between 1300 and 4000RPM."